练习题： 1 It is universally acknowledged that nothing is more precious than time,__________.
2. _________!The accident could have been avoided.
参考答案：
1. while nothing is less cherished than time
2. If only you were more careful
体坛英语资讯：Hamilton beats Bottas taking Australian GP pole
国内英语资讯:Interview: Italy-China partnership rests on solid foundations, says Italian president
以史为鉴，民主党暂且放弃弹劾特朗普
国际英语资讯:Brazils ex-President Michel Temer arrested in corruption investigation
国内英语资讯:China vows deeper VAT reform to boost economic vitality
国际英语资讯:U.S. Fed leaves rates unchanged, plans to end balance sheet runoff at end of September
国际英语资讯:Tunisian president urges politics to show responsibilities
体坛英语资讯：Team spirit is secret to Chinas victory: chess grandmaster Shen Yang
生活中的英国女王是什么样？
我国科学家发现了可抑制HIV扩散的蛋白质
过马路请小心！韩国设激光束警示装置提醒低头族
我国结婚率创历史新低
体坛英语资讯：Zidane promises Real Madrid players a clean slate for the last 11 games of the season
替孩子去拼！美国“扫雪机父母”成主流
神经学家解读:什么是偏头痛
你每周吃掉一张信用卡大小的塑料
你捡到钱包会还给失主吗？调查显示，钱包里钱越多归还率越高
体坛英语资讯：Interview: Chinese companies can be key player in African football-related business: Lagardè
国内英语资讯:Licensed social workers in Shanghai hits record high
体坛英语资讯：Andreescu continues amazing run at Indian Wells, to face Kerber in final
国际英语资讯:State lawmaker injured by gunmen in northern India
国内英语资讯:Premier Li urges solid efforts to accomplish annual target, tasks
体坛英语资讯：Kenya dominates Jerusalem Marathon
坐船有助于改善睡眠?
Instagram推出网购功能，冲动消费从未如此方便
体坛英语资讯：FIFA agrees to work with Qatar on 48-team World Cup in 2022
国际英语资讯:Spotlight: Jordans agricultural sector fails to benefit from border reopening with Syria:
国内英语资讯:President Xi meets Harvard president
国际英语资讯:Pompeo attends Mideast summit in Jerusalem
The Image of China 中国的形象